I have characters who literally don't feel like themselves to me if their feet are touching the ground.
I mean, you can build around endurance, and moving around inside a mission map doesn't require that much speed, so when it comes down to it, I don't need a travel power at all. Ninja Run + sprint is really enough for most purposes. But Hover has a defense bonus and all flying powers have inherent knockback mitigation. Mystic flight makes it possible to teleport around, which can make it easier to take shortcuts around the map. Super Jump, super speed, and fly are all fun to me as ways of moving around anyway.
Ultimately, I just have a blast moving around in this game, period, compared to other MMOs.
So to me, travel powers are about build/character flavor. Is this a Hulk type, or a Superman type, or a speedster? My mage characters just don't feel right when they're not darting around the air.
So, to answer your question, yes. I like fly. I like it a lot.